"One eye was just a little bit weaker. So just to kind of strengthen it, we covered the other one up a little bit a day," Danielle Busby says of her 5-year-old daughter OutDaughtered's Hazel Busby ...

However, one photo he shared made fans do a double take. His sister, Brandee, looks exactly like him, down to their hazel eyes and wide smiles. In fact, they could pass for twins! View the jaw ...

KELLY CLARKSON: BEHIND HAZEL EYES features exclusive interviews with the singer as well as behind-the-scenes footage. Kelly talks from the set of a music video and from a movie premiere ...